Brace yourself for a winter storm like no other—because while the U.S. has been basking in an unusually mild start to the season, that very warmth might be fueling the ferocious storm now barreling across the country. But here's where it gets controversial: Could our changing climate be setting the stage for even more extreme winter weather? Let’s dive in.
In late January 2026, a brutal winter storm swept across the central and eastern U.S., threatening states from Texas to New England with a crippling mix of freezing rain, sleet, and snow. Governors declared states of emergency as forecasters warned of hazardous travel, bone-chilling wind chills, and power outages expected to last for days. This sudden cold snap felt like a shock after weeks of unseasonable warmth—but that warmth might have played a role in the storm’s intensity.
As atmospheric and climate scientists, we study extreme weather events like this one, exploring what drives their formation and how climate change might be influencing their behavior. To understand this storm, we need to look far above the Earth’s surface—more than 20 miles up—to the stratospheric polar vortex.
And this is the part most people miss: Severe winter storms like this one aren’t just random; they’re the result of multiple weather factors aligning perfectly. Winter storms typically form where sharp temperature contrasts meet a southward dip in the jet stream, a fast-moving band of air that steers weather systems. Add a substantial moisture source, and you’ve got the recipe for heavy precipitation.
In this case, a strong Arctic air mass clashed with warmer southern air, while disturbances in the jet stream created ideal conditions for precipitation. The storm system also drew moisture from the unusually warm Gulf of Mexico, supercharging its intensity.
Now, let’s talk about the polar vortex. You’ve likely heard the term when cold Arctic air spills southward into the U.S., but it’s more complex than that. The polar vortex refers to two distinct circulations: one in the troposphere (the lowest layer of the atmosphere) and one in the stratosphere (the layer above it). The stratospheric polar vortex is like a high-altitude jet stream, circling the North Pole. When it stretches southward, it can create ideal conditions for the vertical movement of atmospheric waves, linking the stratosphere to severe winter weather at the surface.
For this January storm, forecasts showed the stratospheric polar vortex overlapping with the jet stream over the U.S.—a perfect setup for cold temperatures and heavy snow. But if the planet is warming, why are we still seeing such intense winter storms?
Here’s the controversial twist: While Earth is undeniably warming due to greenhouse gas emissions, and overall snowfall is decreasing, severe winter weather isn’t going away. Some research suggests that even in a warmer world, cold events—though less frequent—may still pack a punch in certain regions. One reason? Increasing disruptions to the stratospheric polar vortex, potentially linked to rapid Arctic warming.
A warmer ocean also plays a role. More evaporation means more moisture in the atmosphere, fueling storms. However, warming can also weaken storms by reducing temperature contrasts. These opposing effects make it tricky to predict how storm strength will change overall. But one thing is clear: the most intense winter storms may be getting even more intense.
There’s another wrinkle: In a warmer climate, precipitation that once fell as snow might now fall as sleet or freezing rain, adding new challenges to winter weather.
Scientists are working tirelessly to improve predictions and responses to these events, but many questions remain. Much of this research relies on federal funding, including institutions like the National Center for Atmospheric Research (NCAR), which has faced budget cuts. These scientists develop the models and tools that forecasters depend on—and their work is more critical than ever.
So, as we bundle up against this latest storm, let’s ask ourselves: Are extreme winter events the new normal? And how should we prepare for a future where warmth and cold collide in unpredictable ways? Let us know your thoughts in the comments—this is a conversation we all need to have.
